EP 4104442 A4 20230719 - ORTHOGONAL TRANSFORM GENERATION WITH SUBSPACE CONSTRAINT
Title (en)
ORTHOGONAL TRANSFORM GENERATION WITH SUBSPACE CONSTRAINT
Title (de)
ERZEUGUNG ORTHOGONALER TRANSFORMATION MIT UNTERRAUMBESCHRÄNKUNG
Title (fr)
GÉNÉRATION DE TRANSFORMÉE ORTHOGONALE AVEC CONTRAINTE DE SOUS-ESPACE
Publication
Application
Priority
- US 202163172060 P 20210407
- US 202217568871 A 20220105
- US 2022014260 W 20220128
Abstract (en)
[origin: US2022329860A1] This disclosure relates to a transform kernel sharing in video encoding and decoding. For example, a method is disclosed for such transform kernel sharing. The method may include identifying a plurality of transform kernels, wherein each of the plurality of transform kernels comprises a set of basis vectors from low to high frequencies; N high-frequency basis vectors of two or more of the plurality of transform kernels are shared, N being a positive integer; and low-frequency basis vectors of the two or more of the plurality of the transform kernels other than the N high-frequency basis vectors are individualized. The method may further include extracting a data block from a video bitstream; selecting a transform kernel from the plurality of transform kernels based on information associated with the data block; and applying the transform kernel to at least a portion of the data block to generate a transformed block.
IPC 8 full level
H04N 19/12 (2014.01); H04N 19/176 (2014.01); H04N 19/18 (2014.01); H04N 19/61 (2014.01)
CPC (source: EP KR US)
H04N 19/11 (2014.11 - KR US); H04N 19/12 (2014.11 - EP); H04N 19/159 (2014.11 - US); H04N 19/172 (2014.11 - US); H04N 19/176 (2014.11 - EP US); H04N 19/18 (2014.11 - EP KR US); H04N 19/42 (2014.11 - US); H04N 19/593 (2014.11 - KR US); H04N 19/61 (2014.11 - EP KR US); H04N 19/625 (2014.11 - KR); H04N 19/117 (2014.11 - EP); H04N 19/593 (2014.11 - EP); H04N 19/80 (2014.11 - EP)
Citation (search report)
- [I] US 2021099704 A1 20210401 - KOO MOONMO [KR], et al
- [I] US 2021076070 A1 20210311 - JUNG JAEHONG [KR], et al
- See also references of WO 2022216350A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
US 11792431 B2 20231017; US 2022329860 A1 20221013; CN 115769577 A 20230307; EP 4104442 A1 20221221; EP 4104442 A4 20230719; JP 2023528483 A 20230704; JP 2024069325 A 20240521; JP 7451772 B2 20240318; KR 20220153050 A 20221117; US 2024007673 A1 20240104; WO 2022216350 A1 20221013; WO 2022216350 A8 20221229
DOCDB simple family (application)
US 202217568871 A 20220105; CN 202280003870 A 20220128; EP 22764292 A 20220128; JP 2022574597 A 20220128; JP 2024034075 A 20240306; KR 20227035007 A 20220128; US 2022014260 W 20220128; US 202318465814 A 20230912